Laser diode

Laser diode is a type of laser in which the active medium of a semiconductor pn junction similar to that found on light-emitting diodes.
Diode lasers are also sometimes abbreviated as LD or ILD.

The new laser diode is found at the end of this century by scientists at Harvard University. The working principle of this diode is the same as any other diode through the circuit of the electronic circuit, which consists of type p and n. In both types is often produced two voltages, namely:
1. forward biased, current is generated in line with the value of 0.707 for the distribution of V peak, the wave form above (+).
2. backforward biased, this is turning the voltage that can damage an electronic component.